Selling a 2011 27 inch I Mac Computer, 3.4 GHz INtel Core i7. Works great, kept it to run old software and scanner. It's running on Yosemite. I have hardly used it for years now as I sold my scanner. It does have a few blemishes that does not affect functionality. It has 16gb of ram which you could upgrade to 8 gb slots making it 32gb.